Here is a snapshot of WSJT software when receiving first EME signal on 2m with 9el Yagiand NO Pre-amp !!! I was very surprised!!
Some of the signals are actually quite strong like RN6BN (check his site to see why!) The signals are audible with just 7 element yagi.
Recording here:
RN6BN 144.138MHz 30th october 2007 ARRL EME contest.